Calculating mechanism.



E. H. PALMER & w. s; KINSLEY. E- M- 61 H. V- PALMER 5:. W. H. ROBERTS,EXECUTORS OF'E. H. PALMER. DECD- CALCULATING MECHANISM. APPLICATIONFILED DEC. 16, 1909.

1 ,2 1 2,247 Patented Jan. 16, 1917.

. I 9SHEETS-SEEET I.

WWW wx/m 77% fl/ w 064M, m

Wowwa E. H. PALMER.&,W. S. KINSLEY. I E. M- a H. v. PALMER a w. n.ROBERTS, EXECUTORS or E. H; PALMER, DECD.

CALCULATING MECHANISM. APPLICATION FILED DEC. 16, 1909.

Patented Jan. 16, 1917.

' 9SHEETSS HEET 2.

Int/871 2307 5 I. E M V o 255: again- I I a. D==== E EE-EEEH-El:==i=======-===== .15: I In E. Q Z W I Tu E. H. PALMER & w. S. KINSLEY.M- lL-H- V. PALMER & W. H- ROBERTS, EXECUTORS OF E- H- PALMER. DEC'D.CALCULATING MECHANISM. APPLICATION FILED DECflfi. 1909- i 1 12,247Patented Jan. 16, 1917.

9 SHEETS-SHEET a. '77 76 m: mums PETER: ca. rnnmurnm. WASHING you n. c.

E. H. PALMER & w. s. KiNSLEY. E- I- h H, V- PALMER & W. H. ROBERTS,EXECUTORS OF E. H. PALMER, DEC'D.

CALCULATING MECHANISM. I APPLICATION FILED DEC.I6,1909. 1,212,247,Patented Jan. 16,1917. 9 SHEETS-SHEET 4.

am 9 @Q Q w 7 r mm lwm mm 8 \mkw W fiww W n M v ig M Q a i M 9 7 4 m 1%m;- nouns Fin-us ca. :wa'ra M 1m) wAsmm: mu, D. c.

E. H. PALMER & W. S. KINSLEY. E. m. a H. v. PALMER a. w. H. ROBERTS.EXECUTORS or E. H. PALMER. ozc'v.

CALCULATING MECHANISM. APPLICATION FILED DEC. I6. 1909.

] 212 247 Patented Jan. 16, 1917. a 9 SHEETS-SHEET 5- 4/ F I 45 4/\ I r/55 47 5 IIH -\\\I Iimflllqiiii- I: 5/ 7/ E. H. PALMER &-w. s. KINSLEY.E-M. 61. H- V. PALMER L W. H. ROBERTS, EXECUTORS OF E. H. PALMER, DEC'D-CALCULATlNG MECHANISM.

APPLICATION FILED DEC 16,1909 1,212,247. Patented Jan. 16,1917

' 9SHEETSSHEET 6 &

Mb A/X/ MQM 0 7 71 e gs ilk/2921665 6%;

NGNRS .PNOTO umm WASNINIHUN, By C.

v E. H. PALMER & S. KINSLEY. E- M. 01 H. v. PALMER a w. n. ROBERTS,EXECUTORS or E. H. PALMER, own.

v CALCULATING MECHANISM. 1,212,247.

APPLICATION FILED DEC. 15; 1909- Yatented Jan. 16, 1917.

9 SHEETS-SHEET 8.

uidbzeaee, 61 M/ a 1n: nun!!! "nus m. ruo'rournu WASNlNuraM n. c.

9 SHE "8-SHEET 9.

E. H. PALMER & w. 8. KINSLEY.

CALCULATING MECHANISM. APPLICATION FILED DEC. 16, I909.

Patented Jan. 16, 1917.

E, M- k H- V. PALMER 6!. W. H. ROBERTS, EXECUTORS OF E- H. PALMER, DECD.

I w W I M mam n 6 L M 1 QQ QQ Q9 m mwm L bw QQF/ WQW fi g Q u J 9% JI\Sm. $\\h@ a w wQw @m\ W. kl a \\&\ g v w \Q K H @Q RQ \.Q\ i: g FYI m9 MI \k mQ/ 1 UNITED STATES PATENT OFFICE.

EDWARD H. PALMER AND WILLIAM S. KINSLEY, F READING, MASSACHUSETTS; SAIDKINSLEY ASSIGNOR TO SAID PALMER; EMILY M. PALMER AND HAROLD V. PALMER,BOTH OF READING, MASSACHUSETTS, AND WALTER H. ROBERTS, OF MALDEN,MASSACHUSETTS, EXECUTORS 0F SAID EDWARD H. PALMER, DECEASED; SAIDEXECUTORS ASSIGNORS TO EMILY M. PALMER AND HAROLD V. PALMER, INDI-VIDUALLY.

CALCULATING MECHANISM.

Application filed December 16, 1909.

To all whom it may concern:

Be it known that we, EDWARD H. PALMER and VVILLIAM S. KINSLEY, both ofReading, in the county 7 of Middlesex and State of Massachusetts, haveinvented certain new and useful Improvements in Calculating Mechanisms,of which the following is a specification.

This invention relates to calculating apparatus adapted for operationsimultaneously with the typewriting machine, under the control of thelatter, for indicating totals of figures which are being written upon asheet by the typewriting machine.

The object of the invention is to improve and simplify mechanisms ofthischaracter so that the same may be operated at small expenditure ofenergy by a person and without the necessity of an additionalpowerfurnishing motor.

A further object is to enable a typewriting machine to which suchcalculating apparatus is applied or attached to be operatedindependently of the latter, without effecting a change in theindication of numbers and without the necessity of disconnecting anyparts or manipulating a shift key or the like.

Still further objects of our invention are to provide a machine which isefiicient, capable of being operated by persons having the degree ofskill of the average typewriter operator, which is not liable to get outof order and is simple and economical to'construct.

Of the accompanying drawings :Figure 1 represents alongitudinal sectionof an apparatus embodying our invention, in position beneath, so asto beused in connection with,a typewriting machine of a well-known type. Fig.2 is a plan view of the same,the typewriting machine being removed. Fig.3 is a plan view on a larger scale, of the manual operating parts. line44 of Fig. 2, on a larger scale. Fig. 5 is a detail side elevation ofsome of the parts shown in Fig. 4. Fig. 6 is a detail side elevation toillustrate the action and positions of some of the parts when the fingerkey of the apparatus is depressed. Fig. 7 represents a detail frontelevation, enlarged, of

Specification of Letters Patent.

the typewriter carriage.

Fig. 4 represents a section on.

Patented Jan. 16, 1917. Serial No. 533,443. I

the indicators and their ratchet-toothed pinions, and some of theimmediately co-acting parts. Fig. 8 represents a section on line 8'8 ofFig. 7. Fig. 9 represents a section on line 99 of Fig. 7 Figs. 10 and 11are detail plan views of the devices employed in this embodiment of theinvention, for selecting the connection to be made between a manuallyoperated key and the counter actuator, said two figures representingtheparts in different positions. Fig. 12 represents a section on the line1212 of Fig. 10. Fig. 13 represents a section on line 13-18 of Fig. 2,some parts being omitted. Fig. 14 represents a section on line 14.1et ofFig. 2. Fig. 15 is a view similar to a portion of Fig. 14

but omitting some of the parts. Fig. 16 is a detail side elevation ofthe resetting levers. Fig. 17 is a detail view representing an elevationfrom the left of Fig. 16, on a larger scale, and partly in section. Fig.18 is an elevation of part of the selecting mechanism by which theconnection is made with the counter actuatorsat the proper positions ofFig. 19 represents a section on line 19-19 ofFig. 18. The figures so fardescribed all relate to one embodiment of our invention. The followingfigures illustrate modifications or changes in some of the details whichreally constitute a preferred embodiment. Fig. 20 is a detail plan viewon a larger scale than Fig. 2. Fig. 21 is a detail sectional'view,partly in elevation,- of one of the ratchet pinions and the immediatelyco-actingparts Fig. 22 is a detail plan view of some of the parts shownin Fig. 21. Fig. 23 is a detail plan of one of the rack arms and springco-acting therewith. Fig. 24 is a view similar to Fig. 4

but showing some of the preferred structures of details. Fig. 25represents a section on line 2525 of Fig. 20. Fig. 26 represents asection on line 26-26 of Fig. 25. Fig. 27 represents a section on line2727 of Fig. 20. Fig. 28 represents a section on line 2828 of Fig. 20looking in the direction of the arrows.

Similar reference characters indicate the same or similar parts in allof the views.

The embodiment of the invention illustrated in the drawings is designedfor 0peration in connection with one of the standard models oftypewriting machines, such as the Underwood. It is to be Lmderstood,however, that the invention is equally as well adaptable to use inconnection with other typewriting machines, sometimes with more or lessminor modifications in certain of its parts and the arrangement thereofto meet such slightly varying conditions as are brought about bydifferent designs of typewriter frames and arrangements of writing keys.

In the drawings, the fame of the typewriting machine is indicated at 1,said machine having the usual set of keys, those in the upper row,indicated at 2, being the ones which are operated when figures arewritten upon a sheet carried by the typewriter. Accordingly the levers 2may be considered, and referred to as, the number key levers of thetypewriter.

The typwriting machine rests on the calculating mechanism, which latteris an entirely separate and detachable device having a base 5 andinclosing side and end frames, the side frame being indicated at 6 andeach side frame consisting in part of a detachable piece or member 7 Forconvenience of illustration, the base 5 is shown as solid; but inpractice it would usually be made with openings to avoid undue weight,and to give access if needed to portions of the calculating apparatus.

When the typewriter is placed upon the frame, it is steadied thereon bymeans of upright studs 8 on the side frames. Said studs practicallyconstitute dowel pins, adapted to enter the usual holes in the base ofthe typewriter frame which are employed to receive the screws which areused to attach the customary rubber feet or pads to the base of thetypewriter frame.

The inclosing frame of the present mechanism has, as stated, removableside parts 7 which are detachably fixed in position as by suitablescrews. These detachable side portions 7 support some of the workingparts as hereinafter described. Owing to the removability of saidportions 7, the parts carried and supported thereby may be removed fromthe rest of the mechanism, thereby permitting ready access foradjustment and repairs either to the removed parts or those which remainin the lower portion of the frame.

The varied amounts of movement required to indicate values and tabulateresults, are obtained by the proportional angular motion of actuatingarms 10 which are firmly keyed at suitable distances apart on atransverse rockshaft 9, said shaft being journaled in the side framemembers 7. To normally hold said shaft 9 in such position that the lowerends of its arms 10 will remain in proper normal positions, suitablespiral springs 13 (see Fig. 2) may be mounted upon the shaft 9, each ofsaid springs being fixed at one end to the frame and at the other end tothe hub of the nearest arm 10. For reasons hereinafter described, thearms 10 are so formed and connected with the other parts that the lowerends of said arms are about 30 forward of the vertical plane passingthrough the axis of the shaft 9 which carries said arms.

A. rod or bar 15 parallel with the shaft 9 is fixedly mounted in theside frame mem bers 7. Said shaft 9 and rod 15 serve as fulcrums fornine groups of three parallel levers, these groups being designed toimpart a rocking motion to. shaft 9 of from one to nine graduallydiffering amounts of angular motion, thereby affording a gradual controlof motion corresponding to the proportional values of the nine digits,said val ues being borne by the finger disks 16 as shown in Fig. 2.These parallel levers are all loosely mounted, the two outside levers ofeach group being fulcrumed on shaft 9 between two of the severalactuating arms 10, and the central lever of each group being looselymounted. on rod 15 and positioned directly under one of the number keylevers 2 of the typewriter. A description of one group will serve forall.

The manually operated key lever 17 (Figs. 2, 3, 4 and 5) of each group,(the finger disk 16 being secured to the outer end of such lever 17) isfulcrumed on shaft 9 and extends horizontally forward nearly to rod 15where it is offset to pass under that shaft permitting its downwardmotion. Its finger disk 16 of course bears a number to indicate theproportional motion-controlling power of that lever 17. The contact ofthe upper edge of the lever 17 with the under side of the front bar ofthe frame 7 prevents any upward motion above the position shown in Figs.1 and if, a pin 18 set in the base 5 (see Fig. 6) serving to limit thedownward motion of said lever. The purpose of this lever 17 whenmanually depressed, is to depress the middle or center lever 19 of eachgroup, said lever 19 being fulcrumed on rod 15 and extendinghorizontally backward and nearly to the shaft 9-, said lever 19carryinga laterally projecting stud 20 which passes under the lever 17.Thus, the depression of a manually operated lever 17, causes thedepression of the lever 19 in the same group. As all of the studs 20 ofthe levers 19 are equidistant from the pivots of said levers, all of thelevers 19 are depressed to the same extent when actuated by a lever 17.But by mechanism hereinafter described, the amount of motion imparted tothe shaft 9 by the different groups of levers varies according to thenumerical values of the several levers 17.

In order that the depression of either finger lever 17 will cause animpression of the proper amount to be made on the paper on the platen ofthe typewriting machine, there is a connection from each group of leversof the calculating mechanism to the proper number key-lever 2 of thetypewriting machine. Since all of the key levers 2 must be actuated tothe same extent to do the printing, the connections of said levers 2with the different groups of levers of the calculating mechanism must bewith portions of the lat ter which have the same amount of movement asthe number key levers 2. This requisite amount of motion is found at therear ends of the levers 19 which, as stated, all have the same amount ofmovement im parted to them. The connection may be made in various waysbut of course in such manner that any lever 2 can be actuated withoutaffecting any part of the calculating mechanism. One suitable connectionfor this purpose is indicated in Figs. 1, at and 6, and comprises a wire21 looped or booked at its upper end as at 22 so as to be permanentlyengaged with the lever 2, the loop or hook being long enough to permitthe lever 2 to be given its full downward movement when using thetypewriting machine to print numbers without imparting movement to thewire 21. The lower end of the wire passes through an opening 23 near therear end of lever 19, an enlargement 24 being secured to the wire belowthe opening 23. This p rovides a permanent connection between each lever2 and a lever 19 because the wire is never disconnected at either end.At the same time the connection is a yielding one in that lost motion isprovided for the lever 2 in the elongated loop of each wire. Preferablythe rear end of the lever 19 is cut out as at 25 to make room for theenlargement 22L which may be any suitable piece of metal clamped on to acrimped portion of'the wire 21. Any offset or stop device carried by thewire 21 below the opening 23 in the lever 19 will suffice, so long asthe connection be such that actuation of lever 19 will transmit motionto lever 2, while permitting the lever 2 to move downward withoutactuating the lever 19. The means whereby each lever 17 when depressedwill actuate the rockshaft 9 to the proper amount to accord with thevalue borne by the disk 16 of such lever 17, will now be described :Eachof the threemember groups of levers includes also a lever 27 fulcrumedon shaft 9 and projecting horizontally forward therefrom to differentdegrees as indicated in Fig. 3. Each lever 27 is forked as at 28 toreceive a stud 29 projecting horizontally fro-m the side of the adjacentlever 19. The various studs 29 are positioned at different radialdistances from the fulcrums of the several levers 19, and since all ofthe levers 19 have equal motion downward, the studs travel through pathsof various extent, proportional to their distances from the fulcrum rod15. This is due to the engagement of the studs 29 in the slots 28 oflevers 27. Each lever 27 carries a fixed stud 30 near its fulcrumprojecting horizontally to the right and passing across and normallyjust in contact with the shoulder 11 of the adjacent arm 10 which iskeyed on the shaft 9. Thus, the swinging motion of the levers 27 tovarious degrees,

cause a varied degree of rocking motion-of shaft 9, and to all of thetwelve actuating arms lOkeyed thereon.

The angular motion of the arms 10 produced by the operators finger upondisk 16 so as to depress its; lever 17 to its limit, is caused to imparta corresponding proportlonal amount of horizontal motion to a slide 31,there being as many slides 31 as there are counters or indicators ashereinafter described. These slides are light and rigid, designed forrapid longitudinal reciprocating movement, and are slidingly mounted inways provided by suitable sup ports 32 carried by the base plate.

In the accompanying drawings, twelve slides 31 and indicators orcounters 4E6 are shown to permit an indication of any sum from one centto within one cent of 'ten billions of dollars. These slides aresituated beneath and slightly to the left of the arms 10 and normallyjust out of contact therewith, so that rocking of the arms 10 will haveno efiect on any of said slides until a connection is made between theproper arm 10 and slide 31 bythe selecting mechanism hereinafterdescribed, and to insure that the indication or counting will be made onthe proper one of the row of counters to accord with the location(relatively to the decimal point) of the numeral being printed. At apoint just back of where each arm 10, when at rest, overlaps itsco-acting slide 31, said. slide 31 is transversely bored to receive apin 33 movable endwise through said slide, and the arm 10 is notched atits lower end to provide two prongs or fingers 10, 10 the finger 10"being longer than the finger 10 Said pin is held in the slide 31 betweena spring 34 and a spring lever 35 (see Figs. 2, 10, 11 and 12). Thespring 34 is firmly fastened at its rear end to the slide 31 and itsflat end normally lies along the right side of the slide 31 and engagesthe right hand end of the pin 33. The levers 35 are actuated ashereinafter described, by selecting mechanism, to shift one pin 33 at atime from the normal position shown in Fig. 10 to the position shown inFig. 11, the latter being the position which the pin must occupy whenits slide 31 is to actuate a counter or indicator.

Normally, the arms 10 will swing freely back and forth-along the outerside of spring 34, as indicated in Fig. 10. But if a pin 33 be shiftedto the position shown in Fig. 11, whatever degree of angular movement isimparted to the arm 10 by the operation of one of the groups of levers,is thus transmitted to the slide 31, drawing the latter backward againstthe pull of a spring 38 which is Connected at its rear end to a hook 39on the slide, and at its forward end to a pin or screw 40, set into thebase plate to constitute an anchorage for the front end of the spring.The springs 33 are always under some tension which is increased whentheir slides are retracted.

The levers are pivoted at 36 to the base of the machine, and the rearend of each spring lever 35 is preferably bent or offset somewhat forcontact with a cam of the sclecting means hereinafter described.

Owing to the fact that the lower ends of the arms 10 are considerablyforward from the vertical plane of the axis of shaft 9 as hereinbeforedescribed, the ends of said arms swing downwardly at the beginning oftheir rocking motion. The fingers 10 of the arms 10 are of such lengthas to engage a pin 33 when such a pin has been shifted to the positionshown in Fig. 11, so as to retract the slide which carries such pin Andit is also of such length that when it passes along the other side of aspring 34, it will prevent any possibility of accidental shifting of apin 33 because the end of such arm 10 acts as an abutment as clearlyindicated in Fig. 10 and the full lines in Fig. 12. In said Fig. 12, thedotted line position of the spring 34 indicates the position when saidspring has been pushed aside by the operation of a lever 35 forcing thepin 33 through the slide 31. The long finger 10 of the arm 10 actuat-esa pin 33 and slide as described, but the shorter finger 10 of the armprevents over-motion of the slide and limits the travel thereof to theexact amount necessary for procuring the actuation of the indicator orcounter correspondingly to the value of the number key by which it maybe operated.

To the forward end of each of the slides is pivoted an arm 41, which istoothed to constitute a rack, said arm 41 being pivotally connected at42 to said slide bar to permit a slight horizontal lateral movement. Aspring 43 acts against the arm 41 so that ratchet teeth 44 formed on oneface of the arm 41 will engage with an adjacent vertical pinion 45, saidpinion having ten vertical ratchet teeth formed on its periphery. Theteeth of the arm 41 and the teeth of the pinion 45 are inclined so thatthe rack arm 41 will actuate the pinion in but one direction. There areas many of such pinions as there are slides 31 and arms 41. Said pinions45 are centrally bored, and carried at the upper ends thereof and fixedso as to rotate therewith, are circular indicating disks 46 bearingnumerals from zero to nine on their up per faces. Upright spindles 47firmly fixed in or to the base member of the frame form mountings forthe ratchet pinions 45, and the rotation of such ratchet pinions bringsthe numbers on their indicating disks 46 successively underneath a viewpoint, or beneath adjacent apertures 48, (Fig. 2), cut in a cover plate49 which covers the forward end of the calculating apparatus frame andreaches back to the forward end of the superposed typewriter frame 1,said cover plate 49 being of course out out or slotted for the passageof the portions of the levers 1'7 immediately below the disks 16.

The extreme forward end of the pivoted rack arm 41 of each slide31 isformed as a wedge 50, its edge being beveled at an angle ofapproximately 45 with its sides, so formed that at the end of itsextreme forward motion, it may contact with an upright pin 53 fixed in amovable arm 51, said arm being pivotally mounted on screw stud 52 fixedin base plate 5. The contact with pin 53 defleets arm 41 at the end ofits forward mo-.

tion, its yielding connection with the slide bar 31, permitting itsratchet teeth to be pressed into contact with those of the ratchetpinion 45, thereby limiting the rotary motion of the latter and lockingit against overanotion from momentum.

In order to carry tens from one indicator to the indicator next to theleft of that in actuation (see Fig. 3) the short flat bar 51, previouslydescribed, which is pivotally mounted on base 5 at 52, carries at itsleft hand end a pivotally mounted arm 54 extending backward slightlybeyond the ratchet pinion 45 at its left, and said bar 51 carries at itsright-ha11d end an arm 55 pivoted at 56 and terminating a little shortof the periphery of the ratchet pinion at its right. btop pins 53 set inthe base 5 limit forward motion of the ends of bars 51 which carry thearm 54. The arm 54 mounted on the left end of bar 51 is finished at itsrear end in the form of a ratchet tooth positioned to enter the teeth ofthe ratchet pinion next adjacent to the left, while the arm 55 pivotedon the right-hand end of bar 51, has a notch 60 cut from its rear end toengage a pin 59 fixed in base plate 5. Both arms are caused to findtheir operative position by force of looped spring 57 coiled aroundscrew stud 52 and suitably engaged at its ends with the arms 54 and 55.Each vertical ratchet pinion 45 carries affixed to its lower part, nearthe surface of base plate 5, a radial projecting tooth 63 so situatedthat once in each rotation of said pinion, this projecting tooth willcontact with pivotally mounted arm 55, rocking it out of connection withrestraining pin 59 and permitting a spring 61 attached to bar 51 atslight tension, to swing'said bar and move the arm 54 a sufficientdistance to rotate the ratchet pinion adjacent at the left, with whichit is engaged, one tooth, thereby carrying one ten to the indicator ofnext higher denomination. It should be observed that the arm 55 normallybears against the stop pin 59 and renders this spring 61 inoperative,but when the radial tooth 63 trips this arm as the figure 9 on theindicating disk passes from beneath the sight opening, the spring isleft free to act.

As shown in Figs. 3, 8, and 9, the springs 61 are mounted in channelsformed in the base 5, thereby locating the springs below the plane ofall moving parts, the outer ends gf said springs being secured at 62 t0the ase.

The upright pin; 53, which forms the pivot for arm 54, projects upwardand, as has been shown, holds the forward end of the rack arm 41 so asto'lock the ratchet pinion to prevent over-rotation thereof, but themovement of lateral bar 51 to carry onto the next indicator also throwspin 53 forward and out of contact with wedge-shaped end 50 of rack arm41, thereby instantly releasing the lock and permitting the ratchetpinion to be rotated a further amount, bringing the numeral of nexthigher value to the view point. The right-hand edge of arm 54is providedwith a wedge-shaped projec-.

tion or cam surface 54*, commencing nearly opposite its single ratchettooth and inclined toward the right in approaching the rear end of saidarm. When the arm 54 is in its rear position, ready for carrying, andits upright pin 53 is providing a lock against over-motion of a slidebar and its associated ratchet pinion, the cam surface 54 is just out ofcontact with an abutment pin 54", but instantly upon forward motion ofthe arm 54 to rotate a ratchet pinion one tooth, this cam edge 54contacting with abutment 54 deflects the rear end of arm 54 toward itsratchet pinion, thereby pressing the point of the ratchet tooth firmlyagainst the pinion and locking it against any greater motion than theone-tenth of a revolution desired. Thus every ratchet pinion is properlylocked and unlocked alternately by the movement of arm 54, as requiredto prevent over-motion in carrying tens, and to permit primary actuationof the ratchet pinion to register numbers directly. By this mechanism anautomatic spring-carrying of tens is effected when any indicator diskcomes into the zero-indicating position, which is equally effective forcarrying through any number of disks, however great, as for carrying toone disk. The carrying device for 7 each disk is individuallyself-operative, being merely controlled by the next disk to as. is theusual practice. There is thus no limit other than the dimensions of themachine frame to the number of disks which can be employed and correctlyactuated.

The slide bars 31 are each provided with a stop 66, (Fig. 4) the contactof which is adjustable by a screw 68 in abutment 67, thereby limitingthe forward motion of the actuating bars induced by force of spring 38.p

A binding screw 68 may be employed to hold the stop screw 68 in itsadjustment.

The rotation of the ratchet pinions-45 and their disks 46 are effectedby the forward return of slide bars 31 by their springs 38 after theyhave been carried back by the arms 10.

Lazy pawls or spring detents mounted on upright studs 64 preventrotation of the ratchet pinions 45 except in one direction. The yieldingconnection between the ratchet teeth 44 of the arm 41 with those formedon the ratchet pinion 45 permits the former to slide over the latter asthe slide bar 31 moves backward, but its forward movement brings itsteeth into operative connection with those of the ratchet pinion 45 torotate the latter according to the extent of the retractive movementgiven to the slide bar by its cooperating actuating arm 10, and itscorresponding forward return movement by its spring 38.

All of the rocking bars 51 which have been released and oscillated forcarrying must be returned to their original position for subsequentsimilar action.

We will now proceed to describe the mechanism illustrated for attainingthis result:Mounted in the side members of the frame is a shaft 70having as many pins 71 projecting therefrom as there are bars 51 (seeFigs. 3, 7, S and 9). Each bar 51 has a cam portion 51", the edge ofwhich is in the path of movement of a pin 71, so that when said shaft 70is rocked, all of its pins 71 will engage the cam edges 51 of those bars51 which have been shifted out of normal. position, and oscillate thebars and their cam portions to positions so that the notches 60 of thearms 55 will engage the fixed pins 59 hereinbefore described and lookall of the bars 51 in alinement in the positions shown in the lowerportion of Fig. 3. The devices for actuating the shaft 7 0 are bestshown in Fig. 13, in which the shaft 70 is shown as provided with an arm72 normally held by means of a spring 73 secured to a post 74, against astop pin 75. A rock shaft 76 which we term the re-set shaft is providedwith an arm 77 which is normally held in the position shown in Fig. 13by means of a spring 78. A trigger 79, pivoted at 80 to the arm 77, hasits tip located above the outer end of the arm 7 2. This trigger is sopivotally mounted and arranged that upon down- 5 the right, instead ofoperated by the latter, ward movement of the arm 77 the trigger willdepress the arm 7 2 and rock the shaft and its pins, the trigger thensnapping past the end of the arm 7 2, yielding on upward movement topass the tip of said arnr 72 to again assume the position shown in Fig.13. As best shown in Figs. 3 and l, the shaft 76 has fixedly mountedthereon, nine arms 81, the outer end of each being slotted and cut awayto form a long lower finger 82 and a shorter upper finger 83. The lowerfinger 82 normally engages the under side of a pin 84: projecting from afinger key lever 17. These parts are so proportioned and positioned thatthe finger 82 receives the impact of the pin 84: and consequentlywhenever any finger key lever is actuated, the shaft 76 is rocked andconsequently its pins will re-set any of the bars 51 that may have beendisplaced. The fingers 83 are short enough to pass down by the pins 84of all of suclrfinger key levers 17 as have not been. actuated. Upon theactuation of any one finger key lever to a distance far enough tocommence to oscillate the shaft 76, it inimedia-tely becomes impossibleto actuate any other finger key lever, because at first the ends of theshort fingers 83' take positions behind the pins 84 of levers 17 notdepressed, so that any attempt, accidentally or otherwise, to depressanother finger key lever, would result in a binding of the pin 8-1 ofthat lever against the tip of the short finger 83. Further movement ofthe actuated finger key lever toward its limit of downward movementcarries all other short fingers S3 underneath the pins 8% of the otherlevers 17, so that if an attempt, accidental or otherwise, should thenbe made to depress another lever 17, the only result would be topositively complete the stroke of the lever 17 which it was intended toactuate, and nothing else would result from the partial depression ofadditional levers 17.

In order to render it certain that a lever 17 once started on itsdownward movement, must be carried to its limit of motion so as toproperly complete the intended indication, the arm 77 is provided with arearwardly extending ratchet segment 87 (see Fig. 13), said ratchethaving a pin or projection 86 at the bottom of its line of teeth. A pawl87, pivoted at 88 to the frame, is provided with a spring 89 which tendsto normally hold the pawl in engagement with the teeth of the segment sothat if the shaft 76 is actuated at all as it is every time a key lever17 is partially or wholly actuated), the pawl 87 will prevent a returnof the shaft 76 and its arms and the actuated finger key lever to normalposition. The pin 86 is so located that it will engage the tip of thepawl 87 when, and only when, the shaft 76 and said actuated finger keylever have been completely actuated. When the pin 86 engages the tip ofthe pawl, it oscillates the latter against the tension of spring 89, anddisengages the pawl from the teeth of the segment so as to permit thespring '78 to act to return the shaft 76 and all of its arms to normalposition. To hold thepawl 87 in its disengaged position long enough topermit all of the ratchet teeth to return to normal position, said pawlis provided with a shoulder 90 and a heel 91. Said shoulder 90 isadapted to be engaged by a catch 92, which is pivoted at 93, and towhich catch one end of the spring 89 is connected. The moment the pin 86throws the pawl out of engagement with the ratchet teeth, the catchholds the pawl until the ratchet segment returns to normal position.When said ratchet segment is thrown down due to the pull of spring 78,the lower edge of said ratchet segment contacts with the top of thecatch 92 and disengages it from the shoulder 90 of the pawl so as topermit the spring 89 to again act and bring the pawl into positionagainst the upper teeth of the ratchet seg ment which is the normalposition for these parts.

It sometimes happens that a typewriter operator accident-allystrikes'two finger key levers at once, and of course the same thing mayhappen in connection with the levers 17. When this does happen, such twolevers can only be slightly depressed, because the different parts whichimmediately begin to move, and which have been described, will so bindupon each other as to prevent the complete downward stroke of two levers17. But if this happened, the ratchet segment 85 would ofcourse moveupward to a limited extent. To provide for this emergency, and to beable to release the pawl 87 in such a case, we provide a lever 9 Lpivoted at 95 and normally held in contact with a stop pin 96 by meansof a spring 97. The lower end of the lever 94: extends forward to aposition slightly above the heel 91 of the pawl 87. It will now beunderstood that whenever it may become necessary to release the pawlfrom the ratchet; segment, a manual actuation of the lever 94 in thedirection of the arrow above said lever in Fig. 13, will dis engage thepawl from the ratchet segment and permit the shaft 76 and its arms toreturn to normal positions under the influence of spring 78.

lVe have mentioned how the mechanism just described must result inre-setting of previously actuated members whenever lever 17 isdepressed. But this of course will leave the counters or indicators invarious positions to show the total of the addition produced. We willnow proceed to describe the mechanism whereby all of the counters orindicators may be reset to zero, in order to prepare the machine for anew piece of work.

Referring to Figs. 3 and 14 to 17 a short shaft 100 is supported at oneend by the frame of the machine, and at the other end by a post 101rising from the base 5. The end of the shaft which is supported by theside frame of the machine passes through a sleeve hereinafter described.To one end of the shaft 100 is fixedly secured a lever 102 which we willherein refer to as the primary ire-setting lever. Also fixed to saidshaft- 100 is an arm 103, the lower end of which is forked as shown inFig. 17. A link 104 connects said arm 103 with an arm 105 of a rockshaft 106, said shaft 106 having twelve fixed arms 107 (see Fig. 2). Theslides 31 are provided with lateral pins 108 which project across thepath of oseillative movement of the arms 107, so that whenever the shaft106 is rocked, all of the slides 31 must be retracted to their utmostlimits, all moving backward in unison and to the same extent. A spring109 (see Fig. 14) is connected to the link 104 and through said linkserves to hold the shaft 106 and its arms in normal position, and alsoserving, through the arm.

103 of the shaft 100, to h old the primary resetting lever 102 in normalposition. The pivotal connection between the link 104 and the arm 103 isprovided by means of a pin 110 (Figs. 14 and 17). Said pin 110 alsopasses through the slot of a link 111, the other end of which is pivotedat 112 to an arm 113 of a shaft 114 (see Fig. 14). Said shaft 114 ismounted at one end in a side member of the frame (see Fig. 3) and at theother end in a post 114 rising from the base 5. Said post 114 alsofurnishes a bearing for the inner end of there-set shaft 76 hereinbeforedescribed. Secured to the shaft 114 is an arm 115 having two triggers116 and 117 pivoted on opposite sides of its outer end (see Figs. 13, 14and the lower part of Fig. 3). The function of trigger 117 will be firstdescribed, referring especially to Fig. 15. The tip of said trigger uponits downward movement acts upon the outer end of an arm 118 projectingrearwardly from a shaft 119, said shaft having an arm 119" (see Fig. 13)which is engaged by a spring 119 to hold the said shaft 119 in normalposition. Said shaft 119 is provided with eleven radial pins 120, all inone row, and in position to engage the locking levers 55 hereinbeforedescribed, so as to hold said levers 55 and prevent their movement atperiods hereinafter described.

Mounted loosely on the shaft 114 (sec Fi 15) is an arm 121 which has apin and slot connection 122 with the arm 118 so that when said arm 118is depressed by the trigger 117 it depresses the arm 121 and raises aratchet segment 123 which is rigidly connected with or forms a part ofthe arm 121 and extends rearwardly. A pawl 124- pivoted to a stud 125 isnormally held by a spring 126 in engagement with the teeth of theratchet segment 123 so as to lock the shaft 119, through the pin andslot connec tions of arms 118 and 121, to prevent the return of theshaft 119 and its radial looking pins 120 until the pawl 124 isreleased. To effect this release, a pin 127 projecting from said pawlpasses through a slot 129 of a link 128, said link being pivoted at 130to an arm 131 of a sleeve 132 which surrounds the shaft 100 (see Figs.15 and 17 Rigidly connected with the outer end of the sleeve 132 is thesecondary re-setting lever 133, the outer end of said lever 133 having afinger piece which extends behind the primary lever 102 so that wheneverthe lever 133 is actuated in a forward and downward direction it mustcarry with it the primary lever 102. In Fig. 15 we show a compara tivelylight spring 134, said spring being connected to the arm 131 so as tonormally hold the lever 133 against a stop pin 135 (see Fig. 16).Theprincipal function of the spring 134 is to prevent any tendency ofthe lever 133 to move partially forward due to friction when the primarylever 102 is actuated. By referring to Fig. 15 it will be seen thatmovement of the lever 133 in the direction of the arrow, and to itslimit, will cause the outer end of the slot 129 of link 128 to engagethe pin 127 and dis engage the pawl from the ratchet segment 123 andpermit the parts to return to normal position.

The shaft hereinbefore described is provided with an arm 140 (see Fig.14), said arm projecting under the trigger 116 so that whenever the arm115 moves down ward, the trigger 116 depresses the arm 140 and thensnaps past its tip to release said arm 140; that is so as to present noobstruction to the upward movement of the arm 140. But owing to thepivotal mounting of the trigger 116, the arm 115 carrying said triggercan move upward at any time regardless of the position of the arm 140.Said arm 140 has a pin and slot connection 141 with an arm 142 looselymounted on the shaft 114, a ratchet segment 143 being fixed to or a partof the arm 142. Said ratchet segment is engaged by a pawl 144 which ispivotally mounted on the stud 125. A spring 145 is connected to thelower end of the pawl. Vhen the parts are in the position shown in Fig.14, the pawl 144 is held out of engagement with the teeth. of segment143 by means of a pin 146 projecting from link 111, so that when theparts are in this position the pawl is released from the ratchetsegment. When all of the counters or indicators are to be re-Set tozero, the operator first pulls forward the primary re-set lever 102, tothe limit prescribed by a. stop pin 147 (Fig. 16), and then releasessaid lever, so that the spring 109 will return the lever to normalposition. Preferably the operator will retain hold of the lever toretard its return movement.

The first portion of the forward motion of lever 102 carries the slides31 backward through arm 103, link 101, arm 105, shaft 106 and its arms107. Further movement of lever 102 completes the rearward movement ofthe slides 31 and also depresses the arm 115 carrying triggers 116, 117.First the trig er 116 acts on arm 110 of shaft so that the pins 71 ofthe latter act on cam portions 51 of bars 51 to set them in normalposition. Then the trigger 117 acts on arm 118 of shaft 119 to place thepins 120 of the latter behind the arms 55 so that the tips of said arms55 will be held in the path of movement of the radial projections 63 ofpinions 15, to prevent movement of said pinions 15 beyond the pointswhere their disks as will indicate the numerals 9 through the sightopenings 4-8. On the return of lever 102, the slides 31 are movedforward by their springs 38 to actuate all pinions 45 to show numerals9. The return motion of lever 102 also permits the triggers 116, 117, toassume their normal positions above the arms 1&0 and 118 respectively,but the arm 118 remains down because pawl 121 is still in engagementwith the ratchet segment 123, and remains so engaged until released bythe movement of parts caused by the actuation of the secondary lever 133as presently described. Then the secondary lever 133 is actuated and theextreme of its forward movement acts through the slotted link 128 torelease pawl 121 and permit arm 118 (see Fig. 15), shaft 119 and itspins 120 to return to normal positions. As the movement of lever 133also brings the lever 102 forward a second time, the connections withthe latter already described cause all slides 31 to move back equaldistances to their limits, so that when the slides 31 return forwardthey Will actuate all the counters to zero. At the end of the returnmovement of the levers, the pin 1 16 in link 111 engages the lower partof pawl 1141 and carries said pawl to the position shown in Fig. 11 soas to re lease the carrying mechanism to normal position. When theratchet segment 1413 is released, the spring 73 (Fig. '13) acts on arm72 to rock shaft 70 and its pins 71 to normal positions, this beingpermitted through arm 112 and arm 1 10 of shaft 7 0.

Upon the lateral position of the typewriter carriage depends thedenominational value of the figure typewritten, and thus, upon thelateral position of the typewriter carriage must depend the connectionfor the actuation of the proper counter-operating bar and its connectedcounting indicator, to express values of corresponding denominations: i.0., if a figure be typewritten representing cents, the disk carried bythe ratchet cylinder at the extreme right must be actuated suflicientlyto indicate the increment of the numeral written, from one to nine invalue. The number of columns required to express sums in figures varieswith ones needs. Sums aggregating billions, with separating commas andperiod, would require sixteen of the positions provided by the traverseof the typewriter carriage, thus permitting five separate columns offigures to be written on a single sheet of paper, where, as in thepresent instance, there are eighty letter positions or steps in thetraverse of the carriage. If, however, the sums required never reach tenthousand dollars, which with separating points would require eight ofthe eighty positions provided by the traverse of the typewritercarriage, ten such columns could be typewritten on a single sheet ofpaper, and their sums total indicated. In order that the carriage mayeffect such control, we have provided a se lective mechanism, operatedby the carriage, by which any of the number keys may be caused toconnect with the appropriate counter actuator according to the positionof the carriage, which is designed as follows :-Referring to Figs. 1, 2,1 and 6, the shaft of the selecting mechanism is indicated at 150, saidshaft having secured thereon as many disks 151 as there are slides 31.Each disk is provided with a lateral projection forming a cam 152 to actupon the rear end of a. spring lever 35 to control the position of thepin 33 and determine whether or not the slide and counter of thatparticular group shall be actuated. One end of the shaft 150 projectsoutside of the inclosing frame of the machine and is provided with aspur pinion 153.

Projecting from the left hand side of the frame 6 (Figs. 2, 18 and 19)is a cylindrical stud 155. Mounted on the inner end of the stud is adisk having ratchet teeth 156 engaged by a pawl 157 pivoted at 158 tothe side 6 of the frame; said pawl acting to restrain rotary motion ofsaid disk. The disk is formed with a portion 159 of greater diameterwhich, for convenience, is referred to as a flange, and with a lateralannular flange 161 which is referred to as the hub flange and issufliciently larger than the stud 155 to receive within it the hub 165of a recessed disk 162 the periphery of which is flanged to receive uponit the steel tape 166. Within the recess of disk 162 is a volute spring163 the outer end of which is secured to av pin 160 projecting from theinner face of the recess, the other end of said spring being secured bypin 16 1 to the hub flange 161. The winding of the spring by rotation ofdisk 156, 159 gives a rotary impetus to disk 162, and the rotation ofsaid disk 162 is restrained by steel tape 166 fixed to and passingaround its periphery, the perimeter measuring practically the same asthe horizontal movementof the typewriter carriage, in its traverse ofeighty step positions. The winding of the spring may be easily effectedby means of a suitable tool inserted in any one of anumber of holes 167in disk 159.

The steel tape 166, which has a hook 169 at one end (Fig. 2), passes upand over a rimmed idler 170 rotarily mounted on pin 171, fixed angularlyin upright post 172 (Fig. 1), said post being fixed to plate 5. Thesteel tape runs horizontally to the right, to be affixed by its hookedend 169 to a loop 173 (Fig. 2) of the typewriter carriage (not shown)provided for the tape connection between the typewriter carriage and thespring. Thus the rotary movement of the flanged disk 162, actuated byspring 163, is suflicient to perform its work, and also that of shiftingthe typewriter carriage, and it is also restrained by steel tape 166 soas to move step by step coincidentally with the carriage movement.

Rotarily and slidably mounted on an outwardly extending hub portion 165of disk 162 (Fig. 19) is a member composed of a hand wheel 174 bearingon its right a pinion Wheel 1541, and projecting to the right of thelatter is a horizontal pin 175 designed to enter one of a series ofsmall holes 176 in flanged disk 162, formed in the are of a circle ofequal radial distance to that of pin .175. This connection is to providefor the rotation of pinion wheel 154, for actuation of other parts stepby step coincidentally with disk 162, and with the step motion of thetypewriter carriage, and to provide for adjustment so that although theentire adding mechanism is retained in fixed lateral position, no partof it being attached to the carriage of the typewriting machine, yet atotalization may be made of columns of figures written on any part ofthe width of the sheet. This member, 154 and 17 1, is held laterallyagainst disk 162 by a coiled spring 177 which surrounds sleeve 165between said member and a flange formed at its extreme left-hand end.The hand piece 174 affords means for sliding the pinion 15 1 at tachedthereto to the left, disengaging pin 175 and rotating it to a newangular position, the various holes being spaced to provide anadjustment such that the actuation of the mechanism for totalizing maybe made to take place at any desired position of the typewritercarriage, as will be later described.

The shaft 150 carries a sixteen-toothed pinion 153 at its extremeleft-hand end (thus agreeing with the step positions required to write abillion of dollars and cents with their necessary punctuation). Thesixteentoothed. pinion 153 is in mesh with the eighty-toothed pinion 154so that the step motion of the carriage permits transmission of rotationto shaft 150 by the power of spring 163, and said wheel is rotatedoppositely by means of the steel tape, when the carriage is manuallyreturned to its righthand position.

The disks 151 are equal in number to the slides 31, and are fixedlymounted on said shaft 150, and spaced correspondingly to said slides sothat their cam-rises 152 during rotary motion will be in line to contactwith spring levers 35 (Figs. 2, 10 and 11), the ends of which levers areso formed as to permit the cam-rises 152 to pass in both r0- tarydirections, thereby rocking said arms horizontally and, by pressingagainst the members 33, shifting the latter to the position where theymay be engaged by actuating arms 10, thus selectively making connectionbetween the rock shaft 9 and the slide bars 31 in order from left toright.

Shaft 150 in each revolution comes to sixteen positions of rest, beingpermitted to pass through twenty-two and one-half degrees of angularmotion at each step of the carriage in this particular embodiment of theinvention. If numbers are to be written consecutively in successivespaces, the disks 151 are so placed that their cam-rises will be atangles of twenty-two and a half degrees apart rotatively, but where aspace is used to write separating commas or the period or decimal pointbetween dollars and cents, the angular spacing is double that amount, orforty-five degrees, thereby af' fordlng a step space in which noactuation of any bar can occur. By changing the rotative position ofdisks 151 relatively to each other on shaft 150, the spacings may bechanged or entirely omitted, the figures being written in columns ofthree, four, five or more, or in a-solid block of twelve figures, ifdesired, and their correct values to talized. More or fewer of these camdisks may be used, according to the number of figures which it isdesired to make the mechanism capable of totalizing, and with variationin the number of such disks, the number of teeth of the spur pinion 153and large pinion 154 will be correspondingly changed. In the presentinvention the pinion 151, has eighty teeth, because the typewriter foruse with which the apparatus is designed has that number of stoppingplaces in its travel, and the pinion 153 has sixteen teeth, because thenumber of figures which may be written and added, with the spaces suchas commas between groups of figures and the space for the decimal point,occupy sixteen spaces of the typewriter travel. For use in connectionwith other typewriting machines, these parts will be correspondinglymodified. q

The number of holes 176 in which the pin 175 may engage corresponds tothe number of spaces which a complete line of figures to be written andtotalized will occupy on the sheet, and the adjustment of the gear 154:relatively to the disk 1 2, determines the position on the sheet atwhich figures to be added may be written. During each revolution of theshaft 150, a complete series of slide bars 31 is put successively intocondition for actuation by any one of the number keys, and severalrevolutions of the shaft may be made during the complete travel of thetypewriter carriage. rrecordingly, by placing the pin 175 in anyselected one of the holes 176, columns of figures written in anyselected part of the sheet may be added by the mechanism, and their sumsindicated by the counter disks.

W'hen the typewriter carriage is being returned manually, the shaft 150having the disks 51 rotates rapidly. This might cause the cam-rises 152to actuate the levers 35 so quickly as to throw the pins 33 out of theirholes in slides 31, since the springs are light. To prevent this, weprovide each slide 31 with a hook 31", the tip of which overlaps thespring 81 but at a. sufficient distance outside thereof to prevent thespring being pushed out far enough to enable a pin 38 to escape.

To prevent any rebound of the slides 31 we employ the following devices,referring particularly to Figs. 8, 4, and 6. A detent bar 180 extendstransversely of the machine above the slides 31 and behind pins 181projecting upward from said slides. In order, however, to cause said bar180 to move backward to permit a slide to be retracted, said bar isprovided with rearwardly extending arms 182 pivotally connected at 183to arms 18% secured to the shaft 9. Therefore, since the shaft 9 isoscillated whenever a finger key lever is depressed due to theengagement of a pin 33 by an arm 'of said shaft, the detent bar will beshifted backward according to the amount of movement that is given tothe shaft 9. This same bar 180 is utilized to prevent over-motionbackward of the shaft 9 and its arms. To effect this, we provide eachfinger key lever 17 with a d-:r.vnwardl v extending lug or stop 185. Thestops 185 are not at uniform distances from the pivots of the levers 17,but are varying distances therefrom so that the stop 185 of each lever17 will, when such lever is depressed, reach the position so that itstip will be behind the bar 180 as shown in Fig. 6 at just the rightpoint to limit rearward movement of said bar 180 but of course limitsthat movement at the right point to permit the shaft 9 to have therequisite amount of motion according to the particu lar lever 17 whichis actuated.

hen resetting to zero is effected, it becomes necessary to raise the bar180 above the plane of the tops of the pins 181 to permit the slides 31to be carried back to a uni form distance as has been described. T0 offeet this lifting of the bar 180 we provide alever 186 pivoted to thebase at 187 and having a shoulder 188 and an incline 189 behind saidpivot. A rod 190 is provided with a cam 191 at its front end and at itsrear end is pivoted at 192 to an arm 193 of the shaft 106. It will nowbe understood that whenever the shaft 106 is oscillated in the mannerhereinbefore described for resetting to Zero, rearward movement of therod 190 which is guided at 19 1 causes the cam 191 to act on theshoulder 188 of the lever 186, so as to depress the rear end of saidlever and raise its front end which projects under the detent bar 180.This raising or lifting is quickly effected, while further movement ofthe shaft 106 in the same direction causes the tip of the cam 191 toride along the incline 189 and hold the lifting lever 186 and the detentbar 180 in the raised positions indicated by dotted lines in Fig. 5. Onthe return movement of the shaft 106 and its arms, the cam 191, slipsover the shoulder 188 and permits the parts to return to the positions Lshown by full lines in Fig. 5.

As the descriptions of the various details have been accompanied byreference to their operations and the timing thereof, furtherdescription of the operation of the machine as a whole will not benecessary.

It is to be understood that Figs. 1 to 19 inclusive represent oneembodiment of our invention. In some respects, however, we

prefer structures of details which will now be described and which areillustrated in Figs. to 28 inclusive. While these may be referred to asmodifications, so as to avoid illustrating a machine in its entiretyincluding these changes, said changes constitute in reality improvementswhich we prefer. In this preferred embodiment of our invention, all ofthe parts which have the same reference characters, as in Figs. 1 to 19,will remain the same as in said figures, and therefore need not be againdescribed in detail. One of the most important preferred embodimentswhich we will now describe, enables us to entirely dispense with thesprings 38, one for each slide 31. We attain this result by making thedetent bar 180 perform the service of returning each slide 31 forward todo the actuating of the counters. In the preferred embodimentillustrated in Figs. 20, 2 1, and 26, the bar 180 has its arms 182pivotally connected at 195 to studs 196 projecting downward from a slideplate 197. At each end, the slide plate 197 is provided or formed with arib 198, adapted to slide back and forth on a guide or way 199. Saidslide plate therefore can reciprocate in a horizontal plane and as itdoes so it, of course, carries with it the bar 180. Since said bar 180is behind the pins 181 rising from the bars 31, when the slide plate 197moves forward, it must return to forward position any bar 31 that hasbeen reciprocated. lVe will now proceed to describe the means foroperating the slide plate 197. At its ends the said plate is providedwith upwardly projecting rack teeth 200, which are engaged by toothedsegments 201 rigidly secured to the shaft 9. As the shaft 9 is providedwith spiral springs 13 hereinbefore described, said springs 13 have atendency to hold the plate 197 in its forward position. The slide plate197 also takes the place of the arms 10 carried by the shaft 9. This iseffected by providing the plate 197 with downwardly projecting pins 202either one of which is adapted to engage a pin 33 of the selectingmechanism, in the same manner as has been described in connection withthe arms 10 engaging said pins 33. This will he understood by comparingFigs. 20, 24 and 25. That is, whenever a finger key lever 17 actuatesthe shaft 9 so that the segments 201 are swung rearwardly, the slideplate 197 is retracted and one of its pins 202 will engage theparticular pin 33 which has been projected by the selecting mechanisminto operative position, to be engaged by a pin 202 so that the rearwardmovement of the plate 197 will retract the selected slide bar 31. Thereturn movement of such slide bar is effected by the engagement of thetransverse bar 180 with the pin 181 rising from the selected slide bar.In this embodiment of the invention, the arms 107 of the shaft 106,instead of engaging pins projecting from the slide bars 31, are reducedin width or tapered at their lower ends as shown at 203, said taperedends projecting into narrow slots 204 (Fig. 20) formed in the slides 31.

To avoid any possibility of the counter disks 46 not occupying exactlythe proper positions for showing their numerals through the sightopenings when the projections 63 arestopped, each ratchet pinion 45 maybe provided with an upper lateral projection 631 (Figs. 21, 22) adaptedto en gage the tip of an arm 205 pivotally connected at 206 to a bar 207which is suitably supported at its ends by the frame of the machine,said bar 207 extending above the pins 53. Said bar is provided with stoppins 208 against which the arms 205 are pressed by springs 209. Thesprings 209 hold the arms 205 normally against the stop pins 208 whichare so located that the tips of the arms 205 will be engaged by thelateral projections 631 when the ratchet pinions are in position toexhibit the digits 9 through the sight openings. But when carrying iseffected, the arms 205 Will yield (thesprings 209 being very light ones)and enable the projections 631 to pass by the tips of the arms 205.

Referring to Fig. 23, the pivoted rack arms 41 may have their rear edgesrecessed as at 410 to receive offset portions 430 of the springs 43. Theends of the springs 43 are attached to fixed studs rising from the baseand therefore do not reciprocate with the arms 41. With the structureshown in said Fig. 23, when a slide 31 is retracted and then a dvancedagain for the actuation of a rack pinion, the recess 410 is of courseshifted so that the offset portion 430 of the spring rides along thestraight rear edge of the arm 41 and therefore holds said arm againstthe ratchet pinion with the full force of the spring 43. The recess 410is so located as to receive the offset 430 of the spring when the arm41. has finished its actuation of aratchet pinion and therefore thepressure of the spring is considerably lightened or may be entirelytaken off, due to the recess 410. This provides for less resistance tomovement of the ratchet pinions when they are being turned around forcarrying. It also aids in holding the arms 41 and the slides 31 inaccurate positions longitudinally of the machine.

When the slides 31 are being actuated to reset the counters orindicators to Zero, there must be brought into action means other thanthe bar 180 for projecting said slides forward, because the said bar 180must necessarily be'lifted from behind the pins 181 in order that saidslides 31 may all be carried backward uniformly.

.Ve will now proceed to describe the mechanism illustrated in Figs. 20,24, 27 and 28, which comes into play when resetting to zero :The slides31 are considerably shorter than in the embodiment first illustrated anddescribed, the rear end of each slide having an upward projection or lug212 which is engaged by a transverse bar 213 to limit forward movementof said slides 31. Behind each bar 31 is a slide 214, the front end ofwhich is preferably laterally beveled or inclined as shown in Fig. 20.The rear end of each slide 214 passes between two guide pins 215 risingfrom the base of the machine or from a strip or bar carried thereby,said slide 214 being pro vided with a lateral shoulder or lug .216 whichengages one of the pins 215 to limit forward movement of the slide.These pins 215 provide for a sliding and also pivotal movement of themembers 214, each said member or slide 214 being normally held with itslug 216 in contact with a pin 215 by means of a spring 217 connected toit and to a fixed point which may be provided. by means of a hookcarried by a fixed cross bar 218. The slides 214 pass between pins 219rising from a transverse slide 220 having a beveled end 221 and normallyheld in the position shown in. Fig. 20 by means of a spring 222 attachedto said slide 220 at 223 and to the base or other fixed point at 224.

The slides 214 normally occupy the positions

